Ok.. So I have spent a quite a few hours trying to figure out tire sizes, metrics, math.. I even broke out the test tubes and still couldn't figure it out.

Which of these is the biggest tire that will fit on my Tacoma? I don't understand the difference between the two options I boxed up in red

Stock 1999 Tacoma SR5 V6 4WD.

I have 15in wheels on there now, and I am going to tour Death Valley and chase some motorcycles as we are shooting a motorcycles series for National Geographic. I can pick the tires out, I just need to find the biggest tire size that will fit on my stock Taco.

Ok.. So I have spent a quite a few hours trying to figure out tire sizes, metrics, math.. I even broke out the test tubes and still couldn't figure it out.

Which of these is the biggest tire that will fit on my Tacoma? I don't understand the difference between the two options I boxed up in red

Stock 1999 Tacoma SR5 V6 4WD.

I have 15in wheels on there now, and I am going to tour Death Valley and chase some motorcycles as we are shooting a motorcycles series for National Geographic. I can pick the tires out, I just need to find the biggest tire size that will fit on my stock Taco.

Click to expand...

they are both the same size. My last set of tires on my '99 tacoma was a pair of 31 x 10.5 x 15's .